Polycirrus disjunctus Hutchings & Glasby, 1986

Glasby, Christopher J. & Hutchings, Pat, 2014, Revision of the taxonomy of Polycirrus Grube, 1850 (Annelida: Terebellida: Polycirridae), Zootaxa 3877 (1), pp. 1-117 : 48

publication ID	https://doi.org/ 10.11646/zootaxa.3877.1.1
publication LSID	lsid:zoobank.org:pub:2695A2A6-2805-4FC6-B6B6-A8C68354B944
DOI	https://doi.org/10.5281/zenodo.4948584
persistent identifier	https://treatment.plazi.org/id/03CD87A2-FFBC-FFF0-FF66-A3CAC373A78B
treatment provided by	Felipe
scientific name	Polycirrus disjunctus Hutchings & Glasby, 1986
status

Treatment

Polycirrus disjunctus Hutchings & Glasby, 1986 View in CoL

Fig. 23a–i View FIGURE 23 , Table 1 View TABLE 1

Polycirrus disjunctus Hutchings & Glasby, 1986: 336–338 View in CoL , fig. 7d–l, 12D.

Type locality. Solitary Islands , NSW, Australia .

Material examined. HOLOTYPE: AM W199632 , Australia, New South Wales, Solitary Islands , 29˚56′ S, 153˚25′ E.

Description. Holotype complete, 13.8 mm long, 1.6 mm wide for 52 segments.

Dorsum anteriorly smooth. Venter anteriorly with mid-ventral groove from segment 3, with poorly defined ventro-lateral pads extending only to segment 5; pads more-or-less smooth apart from weak papillations on segments 2–5.

Buccal tentacles of two types (main tentacle mass detached): (1) cylindrical, thickened distally, distinctly grooved and (2) cylindrical, uniformly thin, weakly grooved, both arising at junction between prostomium and upper lip. Prostomial ridge distinctly curved, extending laterally along anterodorsal base of upper lip. Upper lip trefoiled, small wing-like lobes laterally, margin of medial lobe convoluted; oral surface glandular, ciliated, with grooves leading to mouth. Inner lower lip oblong; outer region subconical lobe protruding above venter, smooth. Achaetous segments visible dorsally but obscured ventrally ( Fig. 23a View FIGURE 23 ).

Notochaetigerous segments 11, extending to segment 13. Notopodia digitiform, posterior ones about 2/3 length of anterior ones, lobes both similar, low and rounded ( Fig. 23b View FIGURE 23 ). Notochaetae within a chaetiger consisting of one type, gradually elongating from dorsal to ventral; pinnate anteriorly, hirsute (possibly result of wear) posteriorly ( Fig. 23c–f View FIGURE 23 ). Neurochaetae beginning on segment 15, 7–12 uncini per row reaching maximum number in midposterior segments. Neuropodial tori erect pinnules, differ along body, becoming more elongate posteriorly. Uncini with long neck and concave base (Type 2), teeth above main fang arranged in single transverse series (MF:3–6), enlarged median tooth above main fang present, subrostral process very small, tooth-like or absent ( Fig. 23g –i View FIGURE 23 ).

Nephridial papillae present, minute, cylindrical. Pre-gular membrane nephridial papillae absent. Post-gular membrane nephridial papillae present, extending from segment 5 to 13; situated at antero-ventral base of notopodia.

Comments. Hutchings & Glasby (1986) report the following variation in the paratypes: 10–11 notochaetigerous segments, neurochaetae from segment 10–14, and dental formula of uncini MF:3–8 ( Table 1 View TABLE 1 ).